. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Flu. 211.—Ckvyaomyxa rhododendri. Teleuto- spore-sorus which has ruptured the lower epi- dermis of a leaf of RkododendTon hirsutum. The teleutospores are pluricellular, and one of them has germinated, giving a promycelium with sterigmata, from which little sporidia are being abjointed. (After De Bary.). Fig. 212.—Chvysomyxa rhododendri on Spruce. The needles are beset with aecidia; discoloured parts of them are show
. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Flu. 211.—Ckvyaomyxa rhododendri. Teleuto- spore-sorus which has ruptured the lower epi- dermis of a leaf of RkododendTon hirsutum. The teleutospores are pluricellular, and one of them has germinated, giving a promycelium with sterigmata, from which little sporidia are being abjointed. (After De Bary.). Fig. 212.—Chvysomyxa rhododendri on Spruce. The needles are beset with aecidia; discoloured parts of them are shown black, the normally green being left white, (v. Tubeuf del.) Chr. abietis (Wallr.).i Needle-rust of spruce. This is parasitic on the spruce {Picea cxcelsa), and is found on the Alps up to an elevation of over 1*700 metres. About the beginning of May the hibernating teleutospores produce promycelia and sporidia. The latter germinate at once, and the germ-tubes make their way through the epidermis into young unfolding needles. The mycelium is well-developed and lives inter- cellularly, sending haustoria into the host-cells; it contains yellow oil-drops, so that by the end of June needles contain- ing it exhibit yellow-coloured stripes. For the remainder of the year reddish-yellow elongated teleutospore-cushions are ^ Reess, Botan. Zeitmig, 1865 ; Die Eostpih/ormen d. deutschen Goniferen, 1869. Willkomm, Die mikroscopiacheii Feinde des Waldts, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. London ; New York [etc. ] : Longmans, Green & co.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
